Plate glass sizing roll



Patented Nov. 28, 1950 UNITED STATES PATENT OFFICE PLATE GLASS SIZINGROLL Robert J. Price, Pittsburgh, Pa., assignor to Pittsburgh PlateGlass Company, Allegheny County, Pa., a corporation of PennsylvaniaApplication March 13, 1946, Serial No. 654,190

an improved sizing roll features of which involve the circulation ofcoolin fluid therethrough.

Sizing rolls of the type under consideration here are used in pairs atthe outlet end of a glass melting tank for the purpose of sizing orflattening molten glass into sheet form as it passes between rolls ofeach pair. Examples of tanks and sizing rolls to which the invention isapplicable are shown generally in U. S. Patent 1,532,134 issued to F.Gelstharp on April 27, 1925.

As a result of the heat contained in the molten glass it is necessary tomaintain the cooling fluid circulating through the rolls to prevent themfrom warping and to prevent other disadvantages that tend to result fromexcessive heat.

According to this invention the roll is so constructed that a fluidcoolin medium is maintained closely adjacent the surface of the rollwithout involving the movement of a central body of the fluid whichwould otherwise have little or ineffective cooling action along the rollsurface where it is required. Water is circulated through the rolls atconsiderable speed, for example, at feet per second and a greatproportion of the water is in contact with the inner surface of theroll. In this manner, a relatively small amount of water cools a greaterarea than that cooled by conventional systems.

In the drawing:

Fig. l is a fragmentary longitudinal section of a. sizing roll; Fig. 2is a cross-section in a vertical plane taken substantially along theline II-II of Fig. 1; and Fig. 3 is a perspective of a cap for a sizinroll core.

In one form of the invention, a sizing roll It! includes a central shellsection l2 of cylindrical or tubular character which is partiallytelescoped with end bearing sections l4, and a core I5 is disposedinside the shell section in spaced relation to the inner walls thereof.The

end bearing sections l4 extend into opposite end portions of the shellsection l2 in closely fittin relation and are formed with radial flangesl5 whose circumferential surfaces are flush with the circumferentialsurfaces of the cylindrical section l2. Suitable fastening elements 59extend through the flanges l6 and. are screwthreaded into the.endportions of. the central sectionto. secure all of these sectionsv in.closely fitting, fluid-tightrelation. Inlet and outlet passages Zil and2L of. the sections are formed;

with. inwardly flaring inner walls 23 substantially conical contoun.

Thecore. l5 ishollow or. shell-like andis-formed by securing. conical;endcaps. 24. upon opposite ends of a cylindricaltube 25. All of theelements of the sizing roll are composed of suitable metal, such assteel, and the conical caps are welded in fluid-tight relation to theends of the tube 25 along circumferential lines or seams 26.

These caps are also formed with fins 29 in v a spider construction andthe fins define planes disposed substantially at right angles toeachother. The longitudinal axis of the sizing roll I8 is coincidental withthe common axis of the central section l2, end sections l4, and hollowcore It. This axis lies substantially in the intersection of the planesdefined by fins 29. The latter are in the form of metal plates which arewelded along lines or seams 30 to the outer surfaces of the conical caps24. The outer corner portions of the fins have bevelled or wedgingsurfaces 3| which fitin wedging relation against inner conical surfaces23 that define the inlet and outlet passages 29 and 2|. These elementsof the sizing roll are so proportioned that the final tightening of thefastening elements l9 causes the surfaces 23 and 3! to wedge snuglyagainst one another so as to hold the core section l5 tightly inside thecylindrical shell 12 in coaxial relation therewith.

From this description it will be apparent that the fins 29 defineopenings 32 leading from the inlet passage as for directing coolingfluid around the outside of the core l5, and through similar openings 34leading into the outlet passage 2|. Thus a relatively thin annular bodyof water passes closely against the inner surfaces of the shell sectionl2 and provides extremely eflicient cooling thereof. It is to be notedthat the length of the shell l2 provides the effective area over whichglass is adapted to be passed in forming it into sheets.

Although illustrative forms of the invention have been shown anddescribed in detail, it will be apparent to those skilled in the artthat the invention is not specifically limited to such forms, but thatvarious changes can be made therein without departing from the spirit ofthe invention or from the scope of the appended claims.

I claim:

1. A hollow sizing roll comprising a central cylindrical section, atubular member inside the central section defining therewith an annularspace, conical caps mounted 'on opposite ends of said tubular member,hollow bearing sections bolted to opposite ends of the centralcylindrical section and having inlet and outlet openings communicatingwith said annular space, said bearing sections having inner conicalwalls spaced respectively in substantially parallel relation from theouter walls of the conical caps, a spider structure extending radiallyfrom the caps as rigid parts thereof and defining passages for thecommunication between the bearing sections and the central section, saidspider structure having outer extremities sloped according to the slopeof said conical walls, and means connecting the bearing sections influid tight relation to the ends of the central section and holding saidconical walls in wedging relation with the sloped extremities of thespider structure.

2. In a sizing roll for flattening molten glass, a cylindrical shellsection, a watertight hollow core inside the cylindrical shell sectionarranged substantially axially thereof and spaced from the inner wall ofsaid section, fins extending radially with respect to the axis of thecore and outwardly from opposite end portions of the core, radialextremities of said fins having beveled edges, in-

let and outlet sections connected in watertight relation to the oppositeends of the shell section and having inner conical walls engaging inwedging relation the beveled edges of said fins to maintain the core inrigid relation in said shell section, and means for securing the inletand outlet sections to the end portions of the cylindrical shellsection, said inlet and outlet hollow sections being arrangedsubstantially axially of the shell section, said fins and hollow coredefining passages communicating from the inlet and outlet sections tothe interior of the shell section.

ROBERT J. PRICE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,291,564 Lavender Jan. 14, 19191,813,142 Boudin July '7, 1931 1,837,562 Mayer Dec. 22, 1931' 2,015,747Drake Oct. 1, 1935 2,135,235 I-Iurford et al Nov. 1, 1938 FOREIGNPATENTS Number Country Date 693,973 France Sept. 8, 1930

